NZ Topo - object class siphon_poly
This page describe the siphon_poly object class used to represent objects in the NZTopo topographic database.
Description
A pipe system comprising a rising leg and a falling leg, typically in the shape of an inverted U. Works on atmospheric pressure
Topo50 description
Only those significant by their size or location are held in the data and shown on the printed maps. Small but significant siphons are captured as point features
See also: canal_poly
Class attributes
| Attribute | Value |
|---|---|
| Object class | siphon_poly |
| Entity class | SIPHON |
| Additional entity class | Not applicable |
| Object inheritance | simple_area |
| Entity source | Proposed NZ Std Entity |
| Map series | Topo50 |
| LSLIFF object class | 345 |
Object attributes
| Attribute | LSLIFF code Shapefile field Data type | Attribute description | Attribute values* | ||
|---|---|---|---|---|---|
| siphon_status | 1093 status string |
| |||
| UFID | 1000 t50_fid integer | A unique identifier for use on Topo50 data in the LINZ Data Service. This is not a universal ID. The intention is to manage these ID’s as persistent, however this is not guaranteed and there will be instances where what appears to be a minor change to a feature may result in a new ID being assigned. |
|
* See explanation of attribute values for more information about how attribute values are represented.
Change log
| Feature version | Revised | Description |
|---|---|---|
| 6 | 2012-08-28 | Updated map image and aerial view; added representation specification and example feature photographs |
| 5 | 2012-08-28 | Added scale-specific definitions |
| 4 | 2009-02-01 | added attribute |
| 3 | 2008-04-10 | removed reference to seed and void objects |
| 2 | 2001-11-23 | unspecified update |
| 1 | 1999-03-01 | intial status |